Extreme Reactors Mod (1.21.1, 1.20.1) – Biggest Reactors and Turbines

Extreme Reactors Mod (1.21.1, 1.20.1) is a version of the Big Reactors mod ported to Minecraft 1.9.4+ that allows you to build multiblock structures (Turbines and Reactors). The reactors generate Redstone Flux (RF) energy, which is used by many industrial mods. They run on Yellorium and produce Cyanite as waste, which is required to build Turbines. The Turbine serves as a passive cooling system for the reactor.

Features:

Key components

• Reactor – consumes fuel (solid or fluid) to generate heat and power or produce steam (when actively cooled).
• Turbine – converts steam into FE; pairs with active-cooled reactors or external steam sources.
• Fluidizer – converts/mixes solid fuels into fluid fuels using solid/fluid injectors.
• Reprocessor – converts wastes into new fuels (3×3×7 multiblock; consumes FE per recipe).
• Power Taps & Fluid Ports – active and passive variants control automatic or request-based transfer of FE/fluids.

Fuel & reactants

• Yellorium – default fuel behavior if no custom properties exist.
• Blutonium – higher-yield fuel obtained by reprocessing Cyanite; produces Magentite waste.
• Fluid fuels – fuels and wastes can exist as fluids; insert via Fuel Injection Ports (inlet/outlet).
• Top-tier or custom fuels (e.g. Verderium) may exist depending on pack; mod API allows adding new fuels and properties.

Turbine coils & output

• Late-game coils provide extreme output; example full-coil outputs (Reinforced Turbine) from mod releases: Ludicrite ~45k FE/t, Ridiculite ~75k FE/t, Inanite ~115k FE/t.
• Pack authors can tune coils with the /er coils command.

Variants, scaling & buffers

• Two main variants: Basic (early-game, small) and Reinforced (large, configurable limits). Machine internal energy/fluid buffers scale with size.
• Reinforced machines require stronger materials (e.g. steel) and can reach very large sizes depending on server config.

Design & performance tips (practical)

• Wider is usually more efficient than taller for fuel usage and output.
• Use a checkerboard fuel-rod pattern and leave ~3 blocks between outermost rods and inner wall for good moderation and cooling.
• Place Heat Manifolds on interior walls aligned with rods (N/S/E/W) to manage heat transfer.
• Prefer higher-tier moderator blocks (when available) inside the core to increase FE/t, but monitor heat carefully.
• Optimize rendering & FPS by using modern client settings; the mod improves fuel rod rendering for large builds.

Passive vs active cooling

• Passive-cooled reactors produce FE directly and are good for early/mid-game; they also produce Cyanite waste used for reprocessing.
• Active-cooled reactors use a coolant (water or mod fluids) to produce steam that feeds Turbines; one reactor can feed multiple turbines.
• Advanced setups can use modded coolants (e.g. Mekanism Liquid Sodium → Superheated Sodium → heat exchangers) to produce vast amounts of steam.

ATM9-specific practical settings

• ATM9 default multiblock limits: Basic Reactor up to 5×5×5, Basic Turbine up to 5×5×10; Hardened/Reinforced sizes may go much larger (pack-dependent).
• ATM9 often applies a power multiplier (e.g. ×3) compared to older guides – expect higher RF/t results (example: a 5×5×5 core may reach ~15k RF/t in ATM9).
• Moderator ranking in ATM9 matters – use the best available blocks (Diamond/Terrasteel/Netherite/Redfrigium etc.) to maximize outputs while tuning heat.

Automation & control

• Computer integration: Reinforced Computer Port supports CC-Tweaked LUA for automation (rod insertion, startup/shutdown, safety).
• To use community reactor-control scripts via HTTP, enable ComputerCraft HTTP on servers: edit serverconfigs/computercraft-server.toml and set [http] enabled = true.
• Use /er commands (op level 2+) to fine-tune fuel values and coils if you maintain a pack.

Reprocessor & recipes

• The Reprocessor crafts new fuels from wastes and fluids; recipes combine items + fluids and consume a set FE per job (example: 1000 FE).
• JEI shows available recipes; modpacks may add additional Reprocessor recipes via standard recipe systems.

In-game docs, dependencies & API

• The Extreme Book (Patchouli) provides in-game documentation – install Patchouli to access it.
• Extreme Reactors requires ZeroCore; ensure the correct ZeroCore version is present.
• An API jar and Maven repository are available for mod authors to integrate or add fuels/reactants.

Config & worldgen

• Ore regeneration and worldgen options exist (e.g. enableWorldRegeneration, userWorldGenVersion) to control ore respawn behavior.
• Adjust server config to allow very large machine sizes if required.

Suggested practical build flow (quick)

1. Build a Basic passive Reactor with inexpensive moderators to get early FE and produce Cyanite.
2. Use Cyanite → Reprocessor to craft improved fuels (e.g. Blutonium) and upgrade to larger/reactor or reinforced parts.
3. Switch to an active-cooled Reactor and add Turbines for higher efficiency; tune turbine coils for late-game output.
4. Integrate automation (ComputerCraft/CC-Tweaked) for safety and efficiency; consider advanced coolant loops (Mekanism sodium → heat exchanger) if you want extreme output.
5. Tune with /er and server configs as a pack author to balance performance and world generation.

Screenshots:

Requires:

Minecraft Forge or NeoForge Installer

ZeroCore Mod

Tesla API (Minecraft 1.10.2 only)

How to install:

Click the following link to view details: How to Install Mods for Minecraft Java Edition on PC: A Beginner Guide

Extreme Reactors Mod (1.21.1, 1.20.1) Download Links

Other Versions:

For Minecraft 1.12.2

Forge version: Download from Server 1 – Download from Server 2

For Minecraft 1.16.5

Forge version: Download from Server 1 – Download from Server 2

For Minecraft 1.17.1

Forge version: Download from Server 1 – Download from Server 2

For Minecraft 1.18.2

Forge version: Download from Server 1 – Download from Server 2

For Minecraft 1.19.2

Forge version: Download from Server 1 – Download from Server 2

For Minecraft 1.20.1, 1.20

Forge version: Download from Server 1 – Download from Server 2

For Minecraft 1.20.6

NeoForge version: Download from Server 1 – Download from Server 2

For Minecraft 1.21.1, 1.21

NeoForge version: Download from Server 1 – Download from Server 2

For Minecraft 1.21.4

NeoForge version: Download from Server 1 – Download from Server 2